Kakao

Get your Kakao Credentials

To use Kakao sign in, you need a client ID and client secret. You can get them from the Kakao Developer Portal.

Make sure to set the redirect URL to http://localhost:3000/api/auth/callback/kakao for local development. For production, you should set it to the URL of your application. If you change the base path of the auth routes, you should update the redirect URL accordingly.

Configure the provider

To configure the provider, you need to import the provider and pass it to the socialProviders option of the auth instance.

import { betterAuth } from "better-auth"

export const auth = betterAuth({
    socialProviders: {
        kakao: { 
            clientId: process.env.KAKAO_CLIENT_ID as string, 
            clientSecret: process.env.KAKAO_CLIENT_SECRET as string, 
        }, 
    }
})

Sign In with Kakao

To sign in with Kakao, you can use the signIn.social function provided by the client. The signIn function takes an object with the following properties:

• provider: The provider to use. It should be set to kakao.

import { createAuthClient } from "better-auth/client"
const authClient =  createAuthClient()

const signIn = async () => {
    const data = await authClient.signIn.social({
        provider: "kakao"
    })
}